<template>
  <div :class="className" :style="{ height: height, width: width }" />
</template>

<script setup>
import * as echarts from 'echarts'
import 'echarts/theme/macarons' // echarts theme
import useResize from './hooks/useResize'

const { proxy } = getCurrentInstance()

const props = defineProps({
  className: {
    type: String,
    default: 'chart'
  },
  width: {
    type: String,
    default: '100%'
  },
  height: {
    type: String,
    default: '350px'
  },
  autoResize: {
    type: Boolean,
    default: true
  },
  chartData: {
    type: Object,
    required: true
  }
})

let chart

watch(() => props.chartData, (value) => {
  setOptions(value)
})

onMounted(() => {
  nextTick(() => {
    initChart()
  })
})

onBeforeUnmount(() => {
  if (!chart) {
    return
  }
  chart.dispose()
  chart = null
})

function initChart() {
  chart = echarts.init(proxy.$el, 'macarons')
  setOptions(props.chartData)
}

function setOptions({ expectedData, actualData } = {}) {
  chart.setOption({
    xAxis: {
      data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'],
      boundaryGap: false,
      axisTick: {
        show: false
      }
    },
    grid: {
      left: 10,
      right: 10,
      bottom: 20,
      top: 30,
      containLabel: true
    },
    tooltip: {
      trigger: 'axis',
      axisPointer: {
        type: 'cross'
      },
      padding: [5, 10]
    },
    yAxis: {
      axisTick: {
        show: false
      }
    },
    legend: {
      data: ['expected', 'actual']
    },
    series: [{
      name: 'expected',
      itemStyle: {
        color: '#FF005A'
      },
      lineStyle: {
        color: '#FF005A',
        width: 2
      },
      smooth: true,
      type: 'line',
      data: expectedData,
      animationDuration: 2800,
      animationEasing: 'cubicInOut'
    },
    {
      name: 'actual',
      smooth: true,
      type: 'line',
      itemStyle: {
        color: '#3888fa'
      },
      lineStyle: {
        color: '#3888fa',
        width: 2
      },
      areaStyle: {
        color: '#f3f8ff'
      },
      data: actualData,
      animationDuration: 2800,
      animationEasing: 'quadraticOut'
    }]
  })
}

function resize() {
  chart && chart.resize()
}

defineExpose({
  resize
})

useResize()
</script>
